Patents by Inventor Marcel Lefort
Marcel Lefort has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4275184Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from ##STR2## wherein R.sub.Type: GrantFiled: October 26, 1979Date of Patent: June 23, 1981Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4263436Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula:(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.Type: GrantFiled: September 18, 1978Date of Patent: April 21, 1981Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4213914Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from: --NO.sub.Type: GrantFiled: December 1, 1978Date of Patent: July 22, 1980Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4208342Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.Type: GrantFiled: July 20, 1977Date of Patent: June 17, 1980Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4180515Abstract: Novel organosilicon compounds containing various functional groups and processes for their preparation are disclosed. The compounds are silanes represented by the following general formula: ##STR1## wherein R represents a hydrocarbon radical containing a carbon-carbon double bond; R.sub.1 represents a hydrocarbon radical; G represents a divalent carbocyclic aromatic or heterocyclic radical; Y represents a group such as Cl, COCl, or COOH; and, n represents an integer equal to 1 or 2.Type: GrantFiled: July 20, 1977Date of Patent: December 25, 1979Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4147711Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;M is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.Type: GrantFiled: November 16, 1977Date of Patent: April 3, 1979Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4145508Abstract: Novel polysiloxane thermoplastic elastomers and processes for their preparation are disclosed. The elastomers are obtained by reaction of .alpha.,.omega.-dihydrogenpolysiloxane with a diethylene silicon compound.Type: GrantFiled: July 20, 1977Date of Patent: March 20, 1979Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4088670Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+ l) possess from 1 to 30 carbon atoms;m is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.Type: GrantFiled: September 29, 1975Date of Patent: May 9, 1978Assignee: Rhone-Poulenc IndustriesInventors: Michel Bargain, Marcel Lefort
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Patent number: 4059608Abstract: A process for preparing hydrogenosilanes by hydrogenating disilanes, especially halogenated disilanes, under relatively mild reaction conditions is disclosed. The hydrogenation is effected in the presence of a catalytic system containing an aprotic compound and a nickel catalyst which consists essentially of finely divided nickel and is obtained by preliminary or in situ reduction of a nickel compound.Type: GrantFiled: March 4, 1977Date of Patent: November 22, 1977Assignee: Rhone-Poulenc IndustriesInventors: Raymond Calas, Jacques Dunogues, Gerard Deleris, Marcel Lefort, Christian Simonnet
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Patent number: 4018871Abstract: Trichlorosilane is dismutated into dichlorosilane in the presence of an .alpha.-pyrrolidone which is N-substituted by a hydrocarbon radical as catalyst.Type: GrantFiled: November 4, 1975Date of Patent: April 19, 1977Assignee: Rhone-Poulenc IndustriesInventors: Gilbert Marin, Marcel Lefort
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Patent number: 3980686Abstract: Dichlorosilane and phenyltrichlorosilane are prepared in good yields by reacting trichlorosilane and diphenyldichlorosilane in the presence of aluminium chloride, as catalyst, and a small proportion of a co-catalyst which is selected from hydrochloric acid and alumina and mixtures thereof, isolating the dichlorosilane from the reaction medium as it is formed and isolating the phenyltrichlorosilane obtained at the end of the reaction.Type: GrantFiled: July 23, 1975Date of Patent: September 14, 1976Assignee: Rhone-Poulenc IndustriesInventors: Marcel Lefort, Gilbert Marin
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Patent number: 3943099Abstract: Halogenated vinyl resins are redendered less susceptible to yellowing on heating by the incorporation of stannic chloride as well as a diorgano-tin dimercaptide.Type: GrantFiled: October 2, 1974Date of Patent: March 9, 1976Assignee: Rhone-Poulenc TextileInventors: Georges Bakassian, Michel Gay, Marcel Lefort